PHOTOCATHODE AND ELECTRON TUBE HAVING THE SAME

Title:

PHOTOCATHODE AND ELECTRON TUBE HAVING THE SAME

Document Type and Number:

Japanese Patent JP2009272102

Kind Code:

A

Abstract:

To provide a photocathode for an ultraviolet ray, which can achieve high quantum efficiency, and to provide an electron tube having the same.

The photocathode 1 has a support substrate 11 composed of a compound semiconductor of a monocrystal, a light-absorbing layer 13 arranged on the support substrate 11, having an energy band gap smaller than the support substrate 11 and generating a photoelectron by absorbing the incident light transmitted through the support substrate 11, and a surface layer 15 arranged on the light-absorbing layer 13 and reducing a work function of the light-absorbing layer 13. The support substrate 11 is formed of Al(1-X)GaXN(0X1), and the light-absorbing layer 13 is formed of the compound semiconductor composed of at least one component selected from a group composed of Al, Ga and In and N.

Inventors:

ARAGAKI MINORU
HIROHATA TORU
YOSHIDA HARUMASA
SUGA HIROBUMI

Application Number:

JP2008120662A

Publication Date:

November 19, 2009

Filing Date:

May 02, 2008

Export Citation:

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Assignee:

HAMAMATSU PHOTONICS KK

International Classes:

H01J1/34; H01J29/38; H01J31/50; H01J40/06

Domestic Patent References:

JPH10188779A	1998-07-21
JPH09199075A	1997-07-31
JPH04351827A	1992-12-07
JP2002150928A	2002-05-24
JP2007080799A	2007-03-29

Attorney, Agent or Firm:

Yoshiki Hasegawa
Shiro Terasaki
Satoru Ishida

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